/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
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package org.apache.iotdb.db.queryengine.transformation.dag.input;

import org.apache.iotdb.db.queryengine.transformation.api.YieldableState;

import org.apache.tsfile.block.column.Column;
import org.apache.tsfile.enums.TSDataType;

import java.util.List;

/** The input data set interface for a UDFPlan. */
public interface IUDFInputDataSet {

  /** returns the input data types, except the timestamp column(the last column). */
  List<TSDataType> getDataTypes();

  YieldableState yield() throws Exception;

  Column[] currentBlock();
}
